Reese Witherspoon's Daughter Ava Turns 16!

Reese Witherspoon is easily one of Hollywood's biggest sweethearts. But besides her Oscar-winning work in films, it's obvious her most important role is as a mom. And thanks to her Instagram page, we get a peek into her lovely family life.

And today marks a pretty momentous occasion in the Witherspoon household — the 16th birthday of her daughter, Ava, with ex-husband Ryan Phillippe. Can you believe that Reese's little girl is all grown up? We couldn't either. But what's even more uncanny is that she looks just like her beautiful mom, sweet smile and all. Seriously, they could be twins.